10 Pack 604ZZ Shielded Ball Bearings 4x12x4 mm Double Shield Miniature Bearings For RC Cars And Trucks, Chrome Steel Durable Construction With Dust And Dirt Protection

604ZZ 4x12x4 Shielded Ball Bearings, Pack of 10
✔️ Grease-lubed chrome steel, double shields, 10 bearings, 4x12x4mm

604ZZ shielded ball bearings are compact, durable components designed for precise rotation in RC cars, trucks, drones, and other hobby machinery. Double metal shields help keep out dust and dirt, while pre-lubrication provides smooth, ready-to-use operation.

✅ 4x12x4 mm size: inner dia 4 mm, outer dia 12 mm, width 4 mm
✅ Shielding: double metal shields (ZZ) protect from dust
✅ Lubrication: pre-lubricated with grease for immediate use
✅ Pack: 10 bearings per pack
✅ Load & speed: Cr 970 N, Cor 360 N; up to 53,000 RPM

💡 What is a sealed ball bearing used for in small mechanical builds like RC cars and robotics?

- Handy for wheel hubs, gear trains, and rotating shafts - Reduces friction and wear in high-speed, precision systems - Keeps out dust and dirt with double shield protection - Pre-lubricated bearings save maintenance time in the field